I am facing problem in reset user name and password.
To set up a new extender, see How do I set up my NETGEAR WiFi Range Extender?.
To reconnect your NETGEAR WiFi range extender via Ethernet:
Connect your range extender to your computer with an Ethernet cable.
Launch a web browser on your computer.
Type http://mywifiext.net into your web browser’s address bar.
Press Enter or click Search.
The login page displays.
For troubleshooting help, see I can’t access http://www.mywifiext.net; what do I do?.
Enter the username and password that you chose during set-up.
Note: The default username is admin and the default password is password. The username and password are case sensitive.
To recover your password, click the Username & Password Help link.
To reset your login credentials, see How do I perform a factory reset on my NETGEAR range extender?.
Click LOG IN.
Select Setup > Wireless Settings.
Under Security Options, verify that the value in the Password (Network Key) field matches your router password.
If the password does not match, change it to your router password.
Reconnect your WiFi devices to the extender.